A. Labels must be located on the same surface of the package and near the proper shipping name marking, if the package dimensions are adequate. A label may be printed on or placed on a securely affixed tag, or may be affixed by other suitable means to a package that contains no radioactive material and has dimensions less than those of the required label; a cylinder; or, a package with an irregular surface upon which a label cannot be satisfactorily affixed. Labels representing subsidiary hazards must be displayed within 150 mm (6 inches) of the other required labels (§172.406(c)).

A. While it is the intent of the HMR that a label be oriented square-on-point on a package when possible, the requirements in § 172.406 do not prohibit the placement of hazard warning labels in an orientation where the square-on-point is located with its flat sides parallel to the edge of the package.

A. The color of a hazard warning label must fall within the color tolerances on the appropriate color chart provided in Appendix A to Part 172 (See § 172.407(d)(4)). Labels conforming to PANTONE® color standards are also acceptable in accordance with § 172.407(d)(5).

A. Section 172.401(c) permits labeling in conformance with the International Civil Aviation Organization's Technical Instructions, IMDG Code, or Canadian Transport of Dangerous Goods Regulations. Section 172.407(f ) permits labeling in conformance with the UN Recommendations on the Transport of Dangerous Goods.